Personally I would go black top 20V. Much more likely to hang together at high RPM (smaller--meaning lighter internals). Built much more like a honda motor. 16V will be ok as long as you dont rev it to much, and you know what they say, engine wear is accellerated at the square of RPM. Dizzy and water plumbing cause little hassels these days especially when you can just ring ant and say that you want these bits (DLi converter and water re-router Saves you a heap of time and mucking around. Best bang for buck, and you can just pick up another long motor cheap enough anyway.